If you find Gmail flags legitimate emails as spam, you can create a safe senders list to make sure they are delivered to your inbox.

Create a file ready for merging—or for use by a mailing service—from one or more sets of Google Contacts ...

How to Create a Confidential Mailing List in Google. Google lets you create mailing lists called "groups" through Google Contacts and Gmail. When you send email to a group, the recipients normally ...